Development and study of a conceptual model of an X-ray source with a field emission cathode

A conceptual model of an X-ray source based on a field emission cathode and a transmission-type target combined with a silicon X-ray window is suggested. By numerical simulation, it is shown that the proposed structure can generate a substantial emission current. It is possible to obtain a small foc...

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Bibliographic Details
Published in:Surface investigation, x-ray, synchrotron and neutron techniques x-ray, synchrotron and neutron techniques, 2017-03, Vol.11 (2), p.443-448
Main Authors: Djuzhev, N. A., Makhiboroda, M. A., Preobrazhensky, R. Y., Demin, G. D., Gusev, E. E., Dedkova, A. A.
Format: Article
Language:English
Subjects:
Cathodes
Chemistry and Materials Science
Field emission
Materials Science
Mathematical models
Membranes
Pressure drop
Silicon
Surfaces and Interfaces
Thin Films
X ray sources
X-rays
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Summary:A conceptual model of an X-ray source based on a field emission cathode and a transmission-type target combined with a silicon X-ray window is suggested. By numerical simulation, it is shown that the proposed structure can generate a substantial emission current. It is possible to obtain a small focal spot at the target and, therefore, a high resolution. The parameters of targets providing the maximum X-ray emission intensity are determined. It is shown that effective generation is reached in a 0.25-μm-thick tungsten film and a 0.13-μm-thick molybdenum film. The transparency of a 1–2-μm-thick silicon membrane to X-rays and sufficient mechanical strength of the membrane against a pressure drop on the order of 2 atm are demonstrated, which indicates the possibility of its application as an X-ray window.
ISSN:1027-4510
1819-7094
DOI:10.1134/S1027451017020239